Hi MannyIII, I agree…and disagree. Certainly rhythm can be expressed in music notation. And it can also be expressed, though less well, in tablature.
I divide my tabs into measures, the same way notation is divided into measures. Usually I use eight dashes in a measure (each dash corresponding to an eighth note, or a count of 1&2&

&4&

though some songs need 16 dashes (equals 16th notes) and some in other timings (3/4 for example) need 6 dashes (1&2&

&

. This type of construction allows rhythm/timing to be conveyed in the same way (more or less) as notation does.
Unfortunately, when tabs are uploaded to Big Bass Tabs, the formatting is changed and the dashes converted to unbroken lines, so the timing info conveyed by the dashes is lost. Sometimes there are marks in the tab to indicate the beat, and that helps.
I agree that it is easiest to learn the rhythm of a song by listening to it rather than trying to get that info from a tab - and many tabs do not convey any timing/rhythm info. Cheers.